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CCS/TRF7970A: Reading out ADC0 values from RF430FRL15xH

jonathan nicollier
Prodigy 40 points
Part Number: TRF7970A
Other Parts Discussed in Thread: RF430FRL152HEVM, RF430FRL152H, MSP-FET

Tool/software: Code Composer Studio

Hello All

I have imported the Demo project "TRF7970ABP_FR4133_FRL_Reader" in CSS 7. All is running fine when i debug with the hardware.

I need some help with reading out the ADC0 on the NFC patch (RF430-TMPSNS-EVM). I have soldering analog hardware on TP7 / TP15. I want to read those value. 

Can someone help me with some codechange, based on the DEMO porject? It's for my Studies.

best reagards

jonathan

  • 0
    TI__Guru*** 133695 points

    Hello Jonathan,

    If you are seeking to test out hardware outside of thermistor on the TMPSNS-EVM, I suggest you adjust your hardware setup. The FR4133 reader code is designed only for that application, and wouldn't be easy to modify.

    I would recommend getting the MSP-EXP430G2 LaunchPad and then using the RF430FRL152HEVM GUI. While you wouldn't be using the EVM itself, you should be able to communicate with the TMPSNS-EVM with it. Though honestly you'd probably be better off getting the EVM anyways as it will make your analog sensor connections cleaner and give you a better experimentation base.

    It also would give you programming options if your sensors need additional firmware beyond what the ROM stack provides.

    You may want to read through our device FAQ by the way: http://www.ti.com/lit/pdf/sloa247

  • 0 in reply to Ralph Jacobi
    Prodigy 40 points

    Hello Ralph

    thanks for your answer.

    I already ordered the MSP-EXP430G2 and the RF430FRL152HEVM. 

    I will then change this code to read adc0 > "RF430FRL152H_NFC_Only_Simple_Project", 

     


    regards jonathan

  • 0 in reply to Ralph Jacobi
    Prodigy 40 points
    Hello Jacobi

    I have some issues.
    I played a little bit with the GUI to read out some DATA. This was functionning a time. But know it says "could not read From Device".
    Also another second RF430FRL152HEVM is not connecting anymore?. I have only one TSNS Patch left which is functionnig. What happen with the others?

    I didn't do anything on them.

    please
    help

    thanks
    jonathan
  • 0 in reply to jonathan nicollier
    TI__Guru*** 133695 points
    Hello Jonathan,

    Let's start with the 152HEVM for starters. Can you see if once you program the board with one of our TI examples via MSP-FET that you can get it up and running again?
  • 0 in reply to Ralph Jacobi
    Prodigy 40 points

    Hello Jacobi

    So, now all is running fine and i can read raw Data. There is Data between 0.2V to 0.65V. I remove the R3 for an external Sensor. (RF430FRL152H)

    The example i use is "TRF7970ABP_G2_FRL_Reader".

    My Question is now, how can i use GAIN 8 to read very low voltage from 0.010V to 0.111V? ist that possible? Hoch can i change the GAIN on the chip with this example?

    Thanks a lot 

    jonathan

  • 0 in reply to jonathan nicollier
    TI__Guru*** 133695 points
    Hello Jonathan,

    That firmware doesn't mess with gain control by default but you could add in that functionality by referencing the Firmware's User Guide to find out which register need to be adjusted for Gain control and then writing firmware to handle that. Page 41 should be what you need.

    Alternatively, the RF430FRL152HEVM GUI will have that feature built into the GUI and can be run from the same hardware as the example you are using.